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a) Estimate Earth's rotational inertia, assuming it to be a uniform solid sphere
b) What torque applied to Earth would cause the length of the day to change by 1 second every century?
A 22-turn circular coil of radius 4.20 cm and resistance 1.00 O is placed in a magnetic field directed perpendicular to the plane of the coil. Calculate the induced emf in the coil at t = 5.20 s
A small conducting spherical shell with inner radius a and outer radius b is concentric with a larger conducting spherical shell with inner radius c and outer radius d. The inner shell has the total charge of -1q and outer shell has a total charge..
Electrons emitted by the photoelectric effect are accelerated and then strike a phosphorescent screen, causing it to glow more brightly than the original scene.
If the average velocity of an object is nonzero in some finite time interval, which of the following must be true during this interval? (Select all that apply.)
Two point charges Q1 = +5.70 nC and Q2 = %u22122.40 nC are separated by 25.0 cm. What is the potential energy of the pair of charges
A spaceship of rest length 192 m races past a timing station at a speed of 0.780c. What is the length of the spaceship as measured by the timing station
A solid, uniform disk of radius 0.250 m and mass 45.1 kg rolls down a ramp of length 5.20 m that makes an angle of 13.1° with the horizontal. Find the speed of the disk's center of mass when it reaches the bottom of the ramp
A uniform disk of radius 0.517 m and unknown mass is constrained to rotate about a perpendicular axis through its center. Find the mass of the disk
To find out if the ball clears the crossbar, what is its height with respect to the crossbar when it reaches the plane of the crossbar?
Explain what are the priorities: more charges or more energy stored in batteries used to propel cars or even light planes. What are the current limitations
A car moves in a flat, circular path of radius R on a surface with a coefficient of kinetic friction of 0.25 and a coefficient of static friction of 0.35. How long does it take the car to complete one orbit
An object of mass 3.02 kg, moving with an initial velocity of 4.95 J m/s, collides with and sticks to an object of mass 2.67 kg, Find the final velocity of the composite object
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